Ch. 7— Federal Programs for Collecting and Managing Oceanographic Data • 269 



Figure 7-3.— Map of the Surveyor Seamount Straddling the Juan de Fuca Ridge Produced 



With Sea Beam Bathymetry 



Two halves of 

 Surveyor Seamount 



The contours depict water depth in meters. The split in the mountain was caused by seafloor spreading. This map shows 

 only 2 percent of the data (about 400,000 data points) obtained by Sea Beam. The detailed features obtained with Sea 

 Beam encouraged scientists to study this area more closely; evidence of recent volcanism has unexpectedly been found. 



Source: National Oceanic and Atmospheric Administration 



